Zinc(II) and mercury(II) coordination architectures with two pyridyl/benzimidazol-1-yl-based ligands: Crystal structures and photoluminescent properties

Zinc(II) and mercury(II) coordination architectures with two pyridyl/benzimidazol-1-yl-based ligands: Crystal structures and photoluminescent properties
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具有两个吡啶基/苯并咪唑-1-基配体的锌(II)和汞(II)配位结构:晶体结构和光致发光特性

DOI:
10.1016/j.ica.2009.02.013
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发表时间:
2009-07
影响因子:
2.8
通讯作者:
Chang, Ze
Chang, Ze
中科院分区:
化学3区
文献类型:
--
作者:
Li, Zuo-Xi;Wang, Jun-Jie;Yan, Li-Fen;Hu, Tong-Liang;Bu, Xian-He;Chang, Ze

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在我们研究配体及其配合物结构之间关系的工作中,发现了两种结构上相关的配体,1-(2-吡啶基甲基)-1H-苯并咪唑(L1)和1-(4-吡啶甲基)-1H-苯并咪唑(L2)及其四种配合物[Zn(L1)2Cl 2](1),[Hg(L1)Br 2] ∞(2),合成了{[Zn(L2)Cl2](CH3CN)} ∞(3)和[Hg(L2)Br2] 2(CH3CN)2(4),通过元素分析、红外光谱和X射线单晶衍射对其结构进行了表征。结构分析表明,1为单核结构,2和3均为一维结构。4为双核结构。1、2和4通过C-H Cl和C-H BrH-键合、C-H π和π π堆积相互作用等弱相互作用进一步连接成更高维的超分子网络。化合物1-4的结构差异可能是由于L1和L2中吡啶侧基的末端N给体原子的空间位置不同,其中吡啶环可能作为配位的导向基团,苯并咪唑环可能作为π-π堆积和C-H-π相互作用的导向基团.进一步研究了配合物和配体的发光性质。
In our efforts to investigate the relationships between the structures of ligands and their complexes, two structurally related ligands, 1-(2-pyridylmethyl)-1H-benzimidazole (L1) and 1-(4-pyridylmethyl)-1H-benzimidazole (L2), and their four complexes, [Zn(L1)2Cl2] (1), [Hg(L1)Br2]∞(2), {[Zn(L2)Cl2](CH3CN)}∞(3) and [Hg(L2)Br2]2(CH3CN)2(4) were synthesized and structurally characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction analysis. Structural analyses show that 1 has a mononuclear structure, and 2 and 3 both take 1D structure. While 4 takes a dinuclear structure. 1, 2 and 4 were further linked into higher-dimensional supramolecular networks by weak interactions, such as C–H⋯Cl and C–H⋯Br H-bonding, C–H⋯π, and π⋯π stacking interactions. The structural differences of 1–4 may be attributed to the difference of the spatial positions of the terminal N donor atoms in the pendant pyridyl groups in L1and L2, in which the pyridine rings may act as the directing group for coordination and the benzimidazole rings act as the directing group for π⋯π stacking and C–H⋯π interactions. The luminescent properties of the corresponding complexes and ligands have been further investigated.
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